A Monitoring Weir in Hubbard Brook Experimental Forest (image) Cary Institute of Ecosystem Studies Share Print E-Mail Caption This is an image of a weir used to monitor stream flow patterns in the Hubbard Brook Experimental Forest. Credit Cary Institute Photo Archive. Usage Restrictions Used in conjunction with the press release. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.